Hot air heater



SII* 17 1940- G. J. ucKoT'rL-:R 2.215.235V

HOT AIR HEATER Filed Feb. 1e, 1958 Patented Sept. 17, 1940 UNITED STATES PATENT oFFlcE HOT AIR HEATER George J Uckotter, Cincinnati, Ohio Application February 16, 1938, Serial No. 190,771

(c1. v12e-72) 1Glaini.

This invention relates to improvements in hot air` heaters of' a type utilizing any of the well known types of fuel.

The object of this invention is to provide an 5 ornamental'structure of such design that maximumheat may be obtained by the use of a minimum amount of fuel. i

More specifically, the invention includes an outer ornamental casing, and an inner casing positioned in spaced relation thereto, the inner casing embodying a multiplicity of horizontally arranged heat tubes directly subjected .to the tact with the outer walls below the horizontal heat from the burner and arranged for the pask sage of air therethrough, the air thus heatedY l5 being discharged into the space ,between the inner and outer chambers for distribution as provided.

Other features will hereinafter appear by reference to the accompanying speciiication and drawing forming parts of this'specication and wherein like characters of reference designate corresponding parts throughout the several views,

in which:

Fig. l is a side elevation partly in section of an embodiment of the invention.

Fig. 2 is a top plan view with a portion'of the ornamental top plate partly cut away.

Fig. 3 is a vertical section on line 2-2 of Fig. 2, and

nection between one of the tubes and the inner wall.

The main casing, which may be yof any desired size and shape, embodies a base portion Icut away at 2 to provide foot portions and a pleasing design at this part of the structure. The walls 3 extend from the base upwardly to form. the outer casing and this casing is provided with elongated slots 4' at its two sides, the slots of each side being substantially parallel and extending for the greater part of the Width of the heater body and are covered with downwardly deflecting louvers 5 as more clearly shown in Fig. 1.

The front and rear walls are formed with elongated slots 6 positioned substantially in a parallel plane with the elongated slots of the side wall and likewise functioning to permit the entrance of air. One of these elongated slots also permits access through the opening 1 to the burner for lighting the latter in the event that gas or the like is used as fuel. A structure formed of end walls 8, 8', front and rear walls 8, 9', and top plate I0 constitutes an air heating chamber. The four walls comprising this chamopenings 4 and 6 and form with relation thereto defiector plates for directing the vmovement oi air admitted through these openings. 5 A multiplicity oftubes extend liromfthe front wall to the rear wall in staggered relationand are fastened to these walls at their extremity by thencvel type of joint disclosed in Fig. 4. In this figure which is illustrative of` any one oi 1 the tubes it will be seen that such tubes I2 are` provided with reduced extremities I4 thereby providing shoulders I5v which are spaced inwardly of the wall to provided room for the accommodation of the asbestos gasket I6. The inner .u chamber having no bottom plate is open directly to the heat irom'the burner I6 showriin dotted line in Fig. 1 and the heat from-this burner travels against and through the staggered tubes upwardly and through the flue I8 formed in the 20 top plate III.

The top plate I0`oi the inner heating chamber is spaced a suiiicient distance below the upper edges of the outer casing sheets to provide room for the decorative closure plate I1. This plate 25 is formed with a multiplicity of pertorations around its edge and inwardly a distance to approximately cover the space between the inner and outer chambers. It will be noted that this cover plate rests upon the top wall of the inner 30 drum and is flanged downwardly at its marginal edges toprovide a flange I8 which abuts against the inner face of the outer walls.

In assembling this structure the walls 9, 8" are placed in an aligned perpendicular position, 35 asbestos gaskets I6 are placed on the ends ofthe pipes I2 and these pipe ends arer inserted in the openings in the plates 9, 9'. The walls 8, .8'. are then bolted together by elongated bolts 20 and secured together by nutsV 2| thus forcing'l the 40 plates against the asbestos4 gaskets and the gaskets against the annular shoulders formed at the pipe ends. It will be noted that each of the pipe ends projects beyond the Aouter iace oi the walls 9, 9 and into the air passages between 45 the outer and inner walls so that a better deflection of the air currents is provided. With the pipes in position the side walls 8, B' are then placed in aligned perpendicular position with'respect to thevwalls 9., 9' .and sealed and secured along their verticalmarginal contacting. edges. When so assembled the outwardly iiared bottomv ends of each of the walls 8, 8 and 9, 9' form a spacing means as well as an air deflector and the extremities oi these dared portions are suit- 55 V ably secured to the inner walls of the outer casing immediatelyA below the transverse slots, whereby the air entering the slots is deflected upwardly and across the projecting pipe extremities as shown.

The foregoing construction provides an assembly in which a maximum amount of air is subjected directly to heat from an adjacent burner in view of the fact that the air is passed from one side of the heater to the other through a multiplicity of staggered tubes. The air is introduced through the outer casing by means of transverse passages situated below the tubes and the movement of the air is facilitated by a curved defiector formed by the outward iiaring of the inner heating chamber. The assembly as shown includes any suitable ornamental design on its outer surface and at the top iS of pleasing appearance due to the arrangement of perforations ln the top plate, the perforations extending around the structure and between the two heating chambers as more clearly shown in Fig. 2. The present device, as previously stated is of such a character that any convenient type of heating element may be utilized, the heating element being confined andwithin the base of the structure and entirely out of view thus avoiding the disadvantages of the unsightly appearance of burners capable of use in air heaters of this general type.

Obviously the direct contact of the flame on the staggered pipes preheats the air contained in the pipes and sets up a circulation between the inner and outer casing. The heated air mingles with the in-coming air from the horizontal slots in the outer casing and this heated air escapes throughthe perforations in the top of the apparatus. Due to the staggered pipe arrangement a maximum amount of heat is absorbed from the heating element and thus the cost of heating is materially reduced.

What I claim as new and desire to secure by Letters Patent is: l

Ina heater, a main outer vertical casing' including a footed base'portion and a perforated top, Aan inner smaller vertical casing having an open bottom and side Wall portions which flare downwardly and outwardly and are secured along their horizontal marginal edges to the inner faces of the outer walls of the main casing, a burner within the base portion for heating the inner casing, elongated horizontal slotsin they outer casing for vdirecting air streams against l the flared portions and thence upwardly between the inner and outer casings, a iiue communicating with the inner casing and extending through the top of the outer casing, a-plurality of horizontal air heating tubes within the inner casing. the front and rear walls of the inner casing having staggered openings which receive the ends of said tubes, vshoulders on said tubes adjacent the ends thereof, gaskets between the shoulders and the inner faces of the corresponding front and rear Walls, and elongated bolts which force the front ,and rear walls against the gaskets.

GEORGE J. UCKOTTER. 

